Multicast isolation

This test checks that customers cannot discover devices between each other's ports by using a multicast discovery protocol. Not allowing multicast discovery traffic prevents unauthorized access to other customers' content.

Tested protocols:

UPnP/SSDP

Address: 239.255.255.250; Port: 1900

mDNS (including Bonjour)

Address: 224.0.0.251; Port: 5353

LLMNR

Address: 224.0.0.252; Port: 5355

Impact: Unauthorized access to resources such as printers or storage devices